function switchbackground(){
	var arraylength = $$('.bg_container').length;
	for (var i=0; i < arraylength; i++){
		if ($$('.bg_container')[i].getStyle('display') != 'none'){ /*Found visible element*/
			var elementToFade = $$('.bg_container')[i];
			if (i == (arraylength-1)){
				var elementToShow = $$('.bg_container')[0];
			} else {
				var elementToShow = $$('.bg_container')[(i+1)];
			}
		}
	}
	//alert (elementToFade);
	new Effect.Fade(elementToFade, { duration: 0.5});
	new Effect.Appear(elementToShow, { duration: 1});
}

	

document.observe('dom:loaded', function () { 
	//alert($$('.bg_container').length);
	for (var i=1; i < $$('.bg_container').length; i++){
		$$('.bg_container')[i].hide();
	}
	var internalcounter = 0;
	if ($$('.bg_container').length >1){
		internalcounter++;
		if (internalcounter > $$('.bg_container').length){
			internalcounter = 0;
		}
		var timer = setInterval('switchbackground("internalcounter")',6000);
	} });